Valve



April 6, 1937. w. CZARNECKI VALVE Filed March 25, 1936 Ihwentor STATiiS PATENT QFFICE VALVE Walter Czarnecki, Eddington, Pa., assignor to Eddington Metal Specialty 00., Eddington, Pa., a corporation of Pennsylvania Application March 23 3 Claims.

This invention relates to valves of the sleeve and piston type, and is concerned primarily with the interrelation between the ton.

sleeve and the pis- In the copending application. of Walter Czarnecki, application Serial No. 31,312, filed July 15, 1935, and now Patent No.

May 26, 1936, and illustrated is commonly employed tions, and these valves and piston assembly,

2,041,906, granted for a Valve, there is described a pressure regulator valve which in oil burner installaordinarily include a sleeve with the piston formed with a valve seat, which is movable to provide the necessary controlling effects.

Due to the fact that this piston is movable under the influence of pressure which is built up in the pressure chamber of the valve, it is important that an efficient seal between the piston and its sleeve ing the service to the fact that small particles of dirt and other foreign matter be created and maintained durlife of the valve. However, due

iind their way in between these parts, continued relative movement therebetween has resulted in scoring, deleterious effect on the seal,

and a general which should be maintained between these parts.

Accordingly,

this invention has in view, as its foremost objective, the provision of a sleeve and piston assembly of the character above described, which includes means for preventing dirt and other foreign matter from becoming inserted between the engaging walls of the piston and sleeve.

piston which carries gasket is eiiective the valve seat, and this to keep foreign matter from finding its way between the walls of the piston and sleeve which engage each other.

Inasmuch as of the piston,

a valve seat is formed on one end this invention has in view, as a more particular objective, the provision of an arrangement whereby the valve seat construction is also availed of as a means for maintaining the washer ton. This end in assembled position on the pisis attained by thickening the end wall of the piston about the valve seat to provide a cylindrical extension around which the gasket is positioned. A metallic washer is then forced over this cylindrical iit which is effective to maintain the a pressed gasket and washer assembled on piston.

Other more extension to provide the head of the detailed objects and advantages 1936, Serial No.

will in part become apparent and in part be hereinafter stated as the description of the invention proceeds.

The invention, therefore, comprises a sleeve and valve piston assembly in which a fibrous gasket is maintained assembled on the head of the piston by a washer which is forced about an extension on the head of the piston to provide a pressed fit.

For a full and more complete understanding of the invention, reference may be had to the following description and accompanying drawing, wherein Figure l is a side view in section, showing the various elements of the sleeve and piston assembly in an exploded relationship,

Figure 2 is another side view, partly in section and partly in elevation, bringing out the assembling of the gasket and washer on the piston, and

Figure 3 is a side view showing the sleeve in section, and the piston and associated parts in elevation.

Referring now to the drawing, wherein like reference characters denote corresponding parts, a sleeve" is shown at H! as being of a cylindrical formation, the upper extremity of which is provided with a flange II that serves to maintain the sleeve in proper position due to the cooperation with other parts, not here illustrated, but clearly set forth in the co-pending application referred to above.

A piston of cylindrical formation is designated l2, and this piston l2 fits and slides in the bore of the sleeve H), which bore is referred to as Hi. The piston I2 is of a hollow construction and its lower end is closed by a head designated [4. Centrally of the piston l2 the material of the head [4 is thickened to provide a cylindrical extension l5 and this thickened portion I5 is formed with an opening I6 which terminates in a valve seat I! that is frustro-spherical in formation. Ordinarily, this valve seat I! is provided with a small groove l8 which constitutes a bleeder in a manner well-known in this art. The valve seat 4 sembled relation being clearly developed in Figure 2.

When the parts are assembled, as shown in Figure 3, the gasket [9 serves to effectively guard against the entry of foreign matter between the bore I3 of the sleeve II] and the exterior surface of the piston I2. After periods of continued usage, this gasket l9 may be replaced by first removing the washer 20 and substituting a new fibrous gasket.

While a preferred specific embodiment of the invention is herein set forth, it is to be clearly understood that I am not to be' limited to the exact construction illustrated and described, because various modifications of these details may be provided in putting the invention into practice, within the purview of the appended claims.

I claim:

1. A sleeve and piston assembly of the character described, comprising a sleeve, a hollow piston having a head at one end slidable in the sleeve, said head being thickened centrally thereof to provide a cylindrical extension, the outer face of the thickened portion of the head being formed with a valve seat, a fibrous gasket disposed about said cylindrical extension, and means for maintaining the gasket assembled on the head of the piston.

2. A sleeve and piston assembly of the character described, comprising a sleeve, a hollow piston having a head at one end slidable in the. sleeve, said head being thickened centrally thereof to provide a cylindrical extension, the outer face of the thickened portion of the head being formed with a valve seat, a fibrous gasket disposed about said cylindrical extension and a metallic washer forced about said cylindrical extension to provide a pressed fit which maintains the washer and gasket assembled on the head of the piston.

3. In a sleeve and piston assembly of the character described, a piston consisting of a hollow piston element formed with a head at one end, said head being thickened centrally thereof to provide a cylindrical extension, the outer face of said thickened portion being formed with a WALTER CZARNECICI. 

